package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    public OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 根据时间营业额统计
     *
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnOverStatistics(LocalDate begin, LocalDate end) {
        //创建一个集合存储从begin--end的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        String dateJoin = StringUtils.join(dateList, ",");
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            //select sum(amount) from orders where status=5 and order_time >beginTime and order_time < endTime ;
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        String turnoverJoin = StringUtils.join(turnoverList, ",");
        TurnoverReportVO turnoverReportVO = TurnoverReportVO.builder()
                .dateList(dateJoin)
                .turnoverList(turnoverJoin)
                .build();
        return turnoverReportVO;
    }

    /**
     * 用户数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //创建一个集合存储从begin--end的  所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        String dateJoin = StringUtils.join(dateList, ",");
        //   存放新增用户
        List<Integer> userList = new ArrayList<>();
        //存放所有用户
        List<Integer> totalList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            Integer count1 = userMapper.countByMap(map);
            totalList.add(count1);
            map.put("begin", beginTime);
            Integer count = userMapper.countByMap(map);
            userList.add(count);
        }
        String userJoin = StringUtils.join(userList, ",");
        String totalJoin = StringUtils.join(totalList, ",");
        UserReportVO userReportVO = UserReportVO.builder()
                .dateList(dateJoin)
                .newUserList(userJoin)
                .totalUserList(totalJoin)
                .build();
        return userReportVO;
    }

    /**
     * 订单数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //创建一个集合存储从begin--end的  所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        String dateJoin = StringUtils.join(dateList, ",");
        //   存放有效订单
        List<Integer> orderList = new ArrayList<>();
        //存放所有订单
        List<Integer> totalList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            map.put("begin", beginTime);
            Integer map1 = orderMapper.countByMap(map);
            totalList.add(map1);
            map.put("status", Orders.COMPLETED);
            Integer map2 = orderMapper.countByMap(map);
            orderList.add(map2);
            //select count(id) orders where ordertime>? and order/Time <?
        }
        String totalJoin = StringUtils.join(totalList, ",");
        String orderJoin = StringUtils.join(orderList, ",");
        Integer totalOrderCount = totalList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = totalList.stream().reduce(Integer::sum).get();
        double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        OrderReportVO orderReportVO = OrderReportVO.builder()
                .dateList(dateJoin)
                .orderCountList(totalJoin)
                .validOrderCountList(orderJoin)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

        return orderReportVO;
    }

    /**
     *获取订单前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSaleTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> saleTop10 = orderMapper.getSaleTop10(beginTime, endTime);
        List<String> names =  saleTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers =  saleTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String nameJoin = StringUtils.join(names, ",");
        String numberJoin = StringUtils.join(numbers, ",");
        SalesTop10ReportVO salesTop10ReportVO = SalesTop10ReportVO.builder()
                .nameList(nameJoin)
                .numberList(numberJoin)
                .build();
        return salesTop10ReportVO;
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);


            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
















